|  AFE 49-13028 DPF Back Exhaust System Fits 2011 Ford Ford Truck Diesel Power Stroke 6.7L The Large Bore HD Performance DPF-Back exhaust features 4" mandrel-bent 409 stainless steel tubing with smooth curves and increased size to help remove restriction and keeps exhaust gasses flowing smoothly. This exhaust system outflows the stock system by 11% for increased performance and lower EGTs. The OE style band-clamps and bayonnet style hangers make sure this system installs cleanly and easily. The back of the system has a unique venting system to help keep EGT's low and maximize exhaust flow. To finish off this awesome exahust, this system comes with a high luster, polished 5" double wall tip. | 
